EP2363668A1 - Dispositif pour la production d'énergie thermique et/ou frigorifique et méthode pour son contrôle - Google Patents

Dispositif pour la production d'énergie thermique et/ou frigorifique et méthode pour son contrôle Download PDF

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Publication number
EP2363668A1
EP2363668A1 EP11156536A EP11156536A EP2363668A1 EP 2363668 A1 EP2363668 A1 EP 2363668A1 EP 11156536 A EP11156536 A EP 11156536A EP 11156536 A EP11156536 A EP 11156536A EP 2363668 A1 EP2363668 A1 EP 2363668A1
Authority
EP
European Patent Office
Prior art keywords
thermofrigorific
plant
primary
frigorific
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP11156536A
Other languages
German (de)
English (en)
Inventor
Giancarlo Sormani
Michele Pontarollo
Mariano Covolo
Francesco Fadiga'
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Hydronics and IT Cooling Systems SpA
Original Assignee
Climaveneta SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Climaveneta SpA filed Critical Climaveneta SpA
Publication of EP2363668A1 publication Critical patent/EP2363668A1/fr
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • F24H15/34—Control of the speed of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/13—Pump speed control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention refers to a plant for the production of thermal and/or frigorific energy including at least one primary water circuit associated with at least one thermo-frigorific unit able to run a thermo-frigorific cycle, and at least one secondary water circuit for users uncoupled from the primary water circuit.
  • the present invention also refers to a method for regulating the thermo-frigorific power supplied by such plant.
  • thermo-frigorific units developed by plant designers, installers or other.
  • thermo-frigorific units This in general determines a complication in the installation and the development of the entire plant, sometimes impairing the function and reliability of the thermo-frigorific units, penalizing the overall efficiency of the system.
  • Air conditioning plants are also common today, utilizing an inverter for the variation of the speed of the pump of the secondary water circuit, with a primary circuit with a fixed water flow rate in order to guarantee the correct function of refrigerators and heat pumps, which have on board electronic controllers able to manage the variations of thermal load just with the fixed water flow rate passing through the exchangers.
  • thermo-frigorific machines In the case that a variable water flow rate would be used in the primary circuit, uncontrolled swings would be started with serious chances of breakage of the ice of the exchangers, or in any case with malfunctions greatly affecting the reliability of the thermo-frigorific machines.
  • variable speed pump is also used in plants mainly diffused in North America in which a single water circuit with variable flow rate is provided, without a secondary circuit. In such case for a regulation according to the load it is necessary to detect the pressure drop in the circuit at the users, modulating the pump in order to cancel the offset between the real and the nominal pressure drop.
  • One of the major drawbacks lamented by the known art consists in that, in order to reach a cost reduction for pumping water without affecting the function and efficiency of the plant and of the thermo-frigorific units integrated in it, it is necessary to provide for a specific equipment at the users.
  • Technical task of the present invention is, therefore, to realize a plant for the production of thermal and/or frigorific energy and a method for its control, permitting to eliminate the technical drawbacks lamented by the known art.
  • one aim of the invention is to realize a plant for the production of thermal and/or frigorific energy and a method for its control, permitting to optimize the pumping costs maintaining the efficiency and function of the system.
  • Further aim of the invention is to realize a plant for the production of thermal and/or frigorific energy and a method for its control, permitting to optimize the pumping costs, independently from the type of equipment present at the users.
  • Not least aim of the invention is to realize a control method of a plant for the production of thermal and/or frigorific energy which can be implemented without changes in a plant which may be previously present at the users.
  • thermo-frigorific energy comprising at least one primary water circuit associated with at least one thermo-frigorific unit able to run a thermo-frigorific cycle, and at least one secondary water circuit for users uncoupled from said primary water circuit, characterized in that in the logic controller of said at least one thermo-frigorific unit a control logic is integrated, for the primary pumping means present in said primary water circuit.
  • control logic is advantageously independent from the type of the present secondary water circuit.
  • thermo-frigorific unit permits to develop "plug and play” solutions, which guarantee the function and the reliability of said at least one unit by maximizing the overall efficiency of the system, simplifying the installation and the development of the overall plant.
  • control logic modulates the flow rate of the primary pumping means in response to a power variation requested by the users.
  • the flow rate of said primary pumping means is modulated continuously through one or more frequency changers of the electric supply of said primary pumping means.
  • the logic controller regulates in combination the thermo-frigorific capacity of at least one thermo-frigorific unit and the flow rate of the primary pumping means.
  • thermo-frigorific capacity of the at least one thermo-frigorific unit is continuously modulated.
  • thermo-frigorific capacity of the at least one thermo-frigorific unit is modulated by keeping the water delivery temperature (Tout) within a suitable range of temperatures requested by the users.
  • the flow rate of the at least one thermo-frigorific unit is modulated in order to keep the water inlet temperature within a suitable range of the nominal inlet temperature of the thermo-frigorific unit.
  • the secondary water circuit has secondary pumping means with constant flow rate.
  • the secondary water circuit has secondary pumping means with variable flow rate.
  • the secondary water circuit has secondary pumping means with constant flow rate and secondary pumping means with variable flow rate.
  • the logic controller has a water sparing function in a winter operation mode, by which it reduces up to a limit value the flow rate passing through the primary circuit, monitors the evaporation/condensation temperature and modulates the flow rate variation, in order to guarantee the keeping of the evaporation temperature within a range of values preserving the function and efficiency of the thermo-frigorific unit.
  • Similar function is present in a summer operation mode through which the controller reduces up to a limit value the flow rate passing through the primary circuit, monitors the condensation temperature and modulates the flow rate variation, in order to guarantee keeping of the condensation temperature within a range of values preserving the function and the efficiency of the thermo-frigorific unit.
  • the controller has a sparing function of the pumping costs of the primary pumping means by which, in case of a minimum or zero load, it turns-off any compressor present in said at least one unit and also turns-off said primary pumping means which are then cyclically turned-on, in order to verify if the return temperature to the water unit of the primary circuit confirms the present of a minimum or zero load, or if a temperature probe positioned inside the secondary circuit indicates a sudden load needed by the users.
  • the controller has a sparing function for the pumping costs of the primary pumping means, by which said primary pumping means are turned-off in presence of a minimum or zero load requested by the users of said dedicated circuit.
  • the present invention also teaches a method for regulating the thermo-frigorific power supplied by a plant for the production of thermal and/or frigorific energy, comprising at least one primary water circuit associated to at least one thermo-frigorific unit able to run a thermo-frigorific cycle, and at least one secondary water circuit for users, uncoupled from said primary water circuit, characterized in that it provides for the control of the thermo-frigorific capacity of said at least one thermo-frigorific unit in combination with the control of the primary pumping means present in said primary water circuit and exclusively demanded to a logic integrated in the logic controller of said at least one thermo-frigorific capacity, when lowering the thermo-frigorific power requested by the users, the thermo-frigorific capacity and the flow rate of said thermo-frigorific unit being modulated in order to keep the water delivery temperature (Tout) and respectively the intake water temperature (Tin) within a suitable temperature range requested by the users and respectively within a suitable range of the nominal inlet temperature.
  • Tout
  • the plant 1 comprises a primary water circuit 2 associated with a thermo-frigorific unit 3 able to run a thermo-frigorific cycle, and a secondary water circuit 4 for the users uncoupled from said primary water circuit 2 by means of an uncoupler 5.
  • thermo-frigorific unit 3 for running the thermo-frigorific cycle namely comprises at least one compressor, at least one lamination valve, at least one condenser and at least one evaporator.
  • thermo-frigorific unit 3 can be a chiller, a heat pump, or a polyvalent unit.
  • thermo-frigorific unit 3 is made by a chiller
  • evaporator is expressively represented with the reference character 6.
  • Tin indicates the water temperature of the primary circuit 2 at the intake of the thermo-frigorific unit 3 and Tout indicates the water temperature of the primary circuit 2 exiting from the thermo-frigorific unit 3.
  • variable delivery primary pumps 15 are associated, which feed the evaporator 6.
  • the secondary water circuit 4 comprises a first user 8 and a second user 9 on two parallel disposed branches.
  • the first user 8 is fed by one or more variable flow rate secondary pumps 10.
  • the first user 8 comprises a first sub-user 8a and a second sub-user 8b fed by the secondary pumps 10.
  • a respective two-way interception valve 11a and 11b is connected in series.
  • the second user 9 is fed by one or more secondary constant flow rate pumps 12.
  • the second user 9 comprises a first sub-user 9a and a second sub-user 9b fed by the secondary pumps 12.
  • a respective three-way valve 13a and 13b is connected in series.
  • Each three-way valve 13a and 13b has a second intake way 13a' and 13b' connected at the intake of the respective sub-user 9a and 9b.
  • thermo-frigorific unit 3 In the logic controller (not shown) of the thermo-frigorific unit 3 a control logic of the primary pumps 15 is integrated.
  • the control logic of the primary pumps 15 is independent from the type of secondary water circuit 4 present, so that at the same time it is applied in combination with the first user 8 characterized by the presence of variable flow rate secondary pumps 10 and with the second user 9 characterized by the presence of constant flow rate secondary pumps 12.
  • the control logic of the primary pumps 15 modulates their flow rate in response to a power variation requested by the user.
  • the flow rate of the primary pumps 15 is in particular continuously modulated through one or more frequency variators of the electrical power supply with which they are fed.
  • the logic controller of the thermo-frigorific unit 3 in response to a frequency variation requested by the user regulates in combination the thermo-frigorific capacity of the thermo-frigorific unit 3 and the flow rate of the primary pumps 15.
  • thermo-frigorific capacity of the thermo-frigorific unit 3 is continuously modulated.
  • thermo-frigorific capacity of the thermo-frigorific unit 3 is modulated by keeping the water delivery temperature Tout within a suitable range around the temperature requested by the user.
  • thermo-frigorific unit 3 When reducing the thermo-frigorific power requested by the user, the flow rate of the thermo-frigorific unit 3 is modulated in order to keep the water intake temperature Tin within a suitable range around the nominal intake temperature of the thermo-frigorific unit 3.
  • the operation of the plant is as follows.
  • thermo-frigorific unit 3 must supply a determined power q to a carrier fluid, and bring the fluid to the user at a predetermined temperature Tout defined according to the needs of the user.
  • the unit works with a determined flow rate ⁇ and with a determined ⁇ T.
  • a load reduction can be obtained, being constant the delivery temperature Tout, either by reducing the ⁇ T being constant the flow rate ⁇ , or maintaining the ⁇ T and reducing the flow rate ⁇ or also working on both variables.
  • the controller therefore has suitable regulation algorithms acting both by modulating the frigorific capacity of the thermo-frigorific unit 3 and by varying the supply frequency of the primary pumps 15.
  • the controller of the unit 3 regulates the thermo-frigorific capacity in a continuous way, by keeping the delivery temperature Tout within a suitable range around the temperature determined by the user, and modulates the flow rate circulating in the primary circuit 3, through the use of frequency variators, in order to keep, when the load is reduced, the intake temperature Tin within a suitable range around the nominal intake temperature, that is to maintain the nominal ⁇ T of the unit.
  • the controller on board of the unit 3 constantly acquires and monitors the temperatures and the other significant variables of the plant, by acting on both regulations with the double aim to satisfy the load (by maintaining q and Tout) and to reduce the pumping costs (by reducing ⁇ ) keeping the efficiency and function of the system.
  • Such solution permits a relevant reduction of the pumping costs without impairing the function of the unit 3 and of the plant 1, is more flexible and can also be applied to existing plants, is independent from the type of secondary circuit 4 which can have both a fixed and variable flow rate (UTA, fan-coil with 2- or 3-way-valves, plants on floor, plants with cold beams, etc8), neither impairing nor modifying the user side, and facilitates the development of the plant.
  • UTA fixed and variable flow rate
  • the sparing of pumping costs is very high, as it is in fact known that the power absorbed by the pumps varies with the cube of the water delivery, and for example with 50% of the water delivery the power absorbed by the pump is one-eighth of that absorbed with 100% delivery.
  • a plant 1 according to the invention is advantageously provided with a series of additional functions having as a common denominator the sparing of pumping costs with a consequent increase of the overall efficiency of the unit 3 - plant 1 system.
  • a first function which can be applied to all hydronic units (chiller, heat pumps, polyvalent units, etc.) consists in turning-off with suitable logics, once having satisfied the load of the plant, the pumps 15 of the primary circuit, which can have a variable speed, or also a fixed speed in a different preferred embodiment, and turning them on just when necessary.
  • each compressor of the unit 3 occurs as a function of the return temperature from the plant Tin and/or of the delivery temperature Tout.
  • the pumps 15 of the primary circuit are generally always left running in order to guarantee the correct reading of the temperatures Tin and Tout.
  • Such first function permits to spare the pumping cost mainly in the conditions of minimum load or during an operation at night, when the unit 3 does not satisfy a real need of the users but only balances the dispersions of the plant 1.
  • the pumps 15 of the primary circuit are cyclically turned-on again in order to verify if the return temperature Tin confirms the lack of load, or as a function of a possible additional probe, disposed in a relevant place of the secondary circuit 4, which signals a supervening need of a load from the users.
  • the frequency of the cyclic turn-ons follows a logic of the self-adaptive kind.
  • a second function refers to the units making it possible to produce in addition to hot/cold water on each primary circuit, hot water for sanitary use on a further dedicated circuit (for example, chiller and heat pumps with partial or total recovery).
  • the integrated controller actuates the pumps of the sanitary water circuit just when there is the need of such load and always considering the state and the working conditions of the unit, so preserving its function.
  • the pumps are turned-on again in order to guarantee a timely response to the needs of the user.
  • the pumps are in any case periodically turned-on again in order to verify if unpredictable loads have arisen.
  • a third function can be applied to the water/water heat pump units and to the water/water polyvalent units and permits to the user to spare tap or well water in the winter operation mode.
  • the controller integrated in the unit When actuating such function, the controller integrated in the unit reduces the flow rate passing through the evaporator up to a limit value which preserves the function and efficiency of the unit itself.
  • the flow rate modulation can be made, according to the embodiment:
  • the reduction of the water supplied to the evaporator involves a lower exit temperature of the evaporator with a consequent reduction of the evaporation temperature.
  • the integrated controller of the unit monitors the evaporation temperature and modulates the flow rate variation in order to guarantee the evaporation temperature within certain limits so preserving the function and efficiency of the unit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
EP11156536A 2010-03-05 2011-03-02 Dispositif pour la production d'énergie thermique et/ou frigorifique et méthode pour son contrôle Ceased EP2363668A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2010A000360A IT1398545B1 (it) 2010-03-05 2010-03-05 Impianto di produzione di energia termica e/o frigorifera e procedimento per il suo controllo

Publications (1)

Publication Number Publication Date
EP2363668A1 true EP2363668A1 (fr) 2011-09-07

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EP11156536A Ceased EP2363668A1 (fr) 2010-03-05 2011-03-02 Dispositif pour la production d'énergie thermique et/ou frigorifique et méthode pour son contrôle

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EP (1) EP2363668A1 (fr)
IT (1) IT1398545B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2632978C1 (ru) * 2013-10-03 2017-10-11 Дайкин Индастриз, Лтд. Холодильное устройство контейнера
EP3076110B1 (fr) * 2015-03-30 2019-02-27 Viessmann Werke GmbH & Co. KG Systeme fluidique et procede de commande d'un systeme fluidique

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH265303A (de) * 1947-11-29 1949-11-30 Sulzer Ag Anlage zum Kühlen mit Hilfe eines flüssigen Kälteträgers.
FR2520853A1 (fr) * 1982-01-29 1983-08-05 Cem Comp Electro Mec Systeme de recuperation, avec elevation du niveau d'energie, des calories dissipees par une machine electrique refroidie par un fluide
US4907417A (en) * 1988-03-21 1990-03-13 Emerson Electric Co. Refrigeration control system for cold drink dispenser
US5743102A (en) * 1996-04-15 1998-04-28 Hussmann Corporation Strategic modular secondary refrigeration
EP1113233A2 (fr) * 1999-12-27 2001-07-04 Carrier Corporation Système de pompe à chaleur réversible
WO2002090851A2 (fr) * 2001-05-03 2002-11-14 Mikael Larsson Procede de regulation de refrigerateurs et systeme associe
WO2003012350A1 (fr) * 2001-07-30 2003-02-13 The Coca-Cola Company Systeme de refrigeration modulaire a base eutectique
WO2008082385A1 (fr) * 2006-12-28 2008-07-10 Carrier Corporation Alimentation non interruptible d'une pompe à eau
US20090293517A1 (en) * 2008-06-03 2009-12-03 Dover Systems, Inc. Refrigeration system with a charging loop

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH265303A (de) * 1947-11-29 1949-11-30 Sulzer Ag Anlage zum Kühlen mit Hilfe eines flüssigen Kälteträgers.
FR2520853A1 (fr) * 1982-01-29 1983-08-05 Cem Comp Electro Mec Systeme de recuperation, avec elevation du niveau d'energie, des calories dissipees par une machine electrique refroidie par un fluide
US4907417A (en) * 1988-03-21 1990-03-13 Emerson Electric Co. Refrigeration control system for cold drink dispenser
US5743102A (en) * 1996-04-15 1998-04-28 Hussmann Corporation Strategic modular secondary refrigeration
EP1113233A2 (fr) * 1999-12-27 2001-07-04 Carrier Corporation Système de pompe à chaleur réversible
WO2002090851A2 (fr) * 2001-05-03 2002-11-14 Mikael Larsson Procede de regulation de refrigerateurs et systeme associe
WO2003012350A1 (fr) * 2001-07-30 2003-02-13 The Coca-Cola Company Systeme de refrigeration modulaire a base eutectique
WO2008082385A1 (fr) * 2006-12-28 2008-07-10 Carrier Corporation Alimentation non interruptible d'une pompe à eau
US20090293517A1 (en) * 2008-06-03 2009-12-03 Dover Systems, Inc. Refrigeration system with a charging loop

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2632978C1 (ru) * 2013-10-03 2017-10-11 Дайкин Индастриз, Лтд. Холодильное устройство контейнера
EP3076110B1 (fr) * 2015-03-30 2019-02-27 Viessmann Werke GmbH & Co. KG Systeme fluidique et procede de commande d'un systeme fluidique

Also Published As

Publication number Publication date
ITMI20100360A1 (it) 2011-09-06
IT1398545B1 (it) 2013-03-01

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